基于两相流理论错齿式迷宫密封的数值研究  

Numerical Study of Interlocking Labyrinth Seals Based on Two Phase Flow Theory

作　　者：周春平 张雨[2] 

机构地区：[1]成都工业职业技术学院轨道交通工程系,四川成都610218 [2]西南交通大学牵引动力国家重点实验室,四川成都610031

出　　处：《机械设计与制造》2018年第1期114-117,共4页Machinery Design & Manufacture

基　　金：国家自然基金资助项目(51205324);牵引动力国家重点实验室自主研究课题资助项目(2017TPL-T2)

摘　　要：基于Mixture模型,以油雾-空气混合物为研究对象,运用Fluent软件数值分析错齿式迷宫密封的内部流场,研究错齿式迷宫密封的密封机理,分析油雾参数对迷宫密封性能的影响规律。研究结果表明:基于两相混合介质分析错齿式迷宫密封性能需要考虑涡流离心力。涡流离心力使油雾颗粒沿壁面运动,颗粒直径越大、浓度越高,壁面运动加强,油雾泄漏量越大,空气泄漏量越小。工程实践中可以运用油雾颗粒的沿壁运动,设置合适的回油孔结构实现回油,减小油雾泄漏。Based on Mixture model, setting the oil vapor-air as the object, the intemal flow and the seals mechanism of the interlocking labyrinth seals were analyzed by Fluent. The effect of oil vapor parameters to the interlocking labyrinth seal mechanism was studied. The results show that, to analyze the performance of interlocking labyrinth seal based on two-phase flow shall consider vortex centrifugal force. Vortex centrifugal force enables oil vapor to move along the wall surface. The larger the oil vapor diameter and volume fraction, the stronger the wall motion, so does the oil vapor leakage rate, but the smaller gas leakage loss is. In engineering application, using the movement of oil vapor along the wall surface and setting the suitable structure of the oil-return hole, to realize oil vapor return and reduce the oil vapor leakage loss.

关 键 词：Mixture模型 错齿式迷宫密封 油雾参数 离心力 

分 类 号：TH16[机械工程—机械制造及自动化] U260.2[机械工程—车辆工程]